Cowpen (Putnam County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 29°36'4", Longitude 82°0'7"

Period of record: 27 sampling dates; August 19, 1988 to December 13, 1999

Surface area (LAKEWATCH): 634 acres / 256 hectacres    (Bathymetric Map)

Lake Region (Griffith et al. 1997): Trail Ridge

Geologic formation (Brooks 1981):

The geology is dominated by quartz sand and quartzite gravel with sandy clay beds of the Hawthorne Formation.

Physiographic region (Brooks 1981):

The water body lies in the Perched Lake and Prairies, Interlachen Sand Hills, and St. John’s Offset divisions of the Central Lake District.
 
 

Supplemental, unpublished water chemistry data, University of Florida.

Numbers reported below are the average for 2 months sampled:
 
pH
4.7
 Sulfate (mg/L)
17.5
Total alkalinity (mg/L as CaCO3)
0.0
 Calcium (mg/L)
3.2
Conductance (µS/cm @ 25 °C)
86
 Magnesium (mg/L)
1.6
Color (Pt-Co units)
2
 Sodium (mg/L)
7.4
Chloride (mg/L)
12.8
 Potassium (mg/L)
0.7
Silicon (mg/L)
0.0
    

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 27 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
1
5
9
Long-term total nitrogen concentrations (µg/L)
40
130
250
Long-term total chlorophyll concentrations (µg/L)
1.0
2.6
8.0
Long-term Secchi depth (ft)
6.0
10.8
15.0

1999 Florida LAKEWATCH Data

Numbers reported below are monthly averages calculated from 3 stations for total phosphorus (TP, µg/L), total nitrogen (TN, µg/L), chlorophyll (CHL, µg/L) and Secchi depth (SECCHI, ft) during 1999:

Date
TP (µg/L)
TN (µg/L)
CHL (µg/L)
SECCHI (ft
Apr-02-99
6
170
3.0
10.3
Dec-13-99
5
160
1.0
11.0
         
1999 Average
6
160
2.0
10.7

Cowpen (Putnam County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on August 19, 1993

Percent area covered with aquatic vegetation (PAC, %)
44
Percent of lake's volume filled with vegetation (PVI, %)
7
Average emergent plant biomass (kg wet wt/m2)
0.8
Average floating-leaved plant biomass (kg wet wt/m2)
0.3
Average submersed plant biomass (kg wet wt/m2)
0.8
Average width of emergent and floating-leaved zone (ft.)
4
Average lake depth (m)
2

Frequency that plant species occur in 10 evenly spaced transects around the lake.

Common Name Plant Species
Frequency (%)
slender spikerush Eleocharis baldwinii
100
red root Lachnanthes caroliniana
90
rush fuirena Fuirena scirpoidea
70
water-pennywort Hydrocotyle umbellata
50
St. John's wort Hypericum spp.
50
yellow-eyed grass Xyris spp.
40
bog-moss Mayaca fluviatilis
30
maidencane Panicum hemitomon
30
spatterdock Nuphar luteum
20
southern cutgrass Leersia hexandra
20
fragrant water-lily Nymphaea odorata
10
cat-tail Typha spp.
10
salt-bush Baccharis spp.
10

Cowpen (Putnam County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 30, 1998

Percent area covered with aquatic vegetation (PAC, %)
70
Percent of lake's volume filled with vegetation (PVI, %)
7
Average emergent plant biomass (kg wet wt/m2)
3.3
Average floating-leaved plant biomass (kg wet wt/m2)
2.3
Average submersed plant biomass (kg wet wt/m2)
0.9
Average width of emergent and floating-leaved zone (ft.)
56
Average lake depth (m)
3

Frequency that plant species occur in 10 evenly spaced transects around the lake.

Common Name Plant Species
Frequency (%)
slender spikerush Eleocharis baldwinii
100
rush fuirena Fuirena scirpoidea
100
St. John's wort Hypericum spp.
100
banana-lily Nymphoides aquatica
90
red ludwigia Ludwigia repens
90
maidencane Panicum hemitomon
90
cone-spur bladderwort Utricularia gibba
70
bog-moss Mayaca fluviatilis
60
wax myrtle Myrica cerifera
60
southern cutgrass Leersia hexandra
50
fragrant water-lily Nymphaea odorata
40
pickerelweed Pontederia cordata
40
torpedograss Panicum repens
40
water-pennywort Hydrocotyle umbellata
20
water-moss Fontinalis spp.
20
red root Lachnanthes caroliniana
20
variable-leaf milfoil Myriophyllum heterophyllum
10
salt-bush Baccharis spp.
10
pipewort Eriocaulon spp.
10
sweetbay Magnolia virginiana
10

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